Intel AP440FX User manual

AP440FX Motherboard

Technical Product Specification

The AP440FX motherboard may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized

errata are documented in the AP440FX Motherboard Specification Update.

May, 1997

Order Number 281830-002

Revision History

Revision

Revision History Date

-001

Release of the AP440FX Technical Product Specification. 7/96

-002

Second release of the AP440FX Technical Product Specification 5/97

This product specification applies only to standard AP440FX motherboards with BIOS identifier

1.00.0x.CT1.

Changes to this specification will be published in the AP440FX Motherboard Specification Update

(Order Number: 281831) before being incorporated into a revision of this document.

Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or

otherwise, to any intellectual property rights is granted by this document. Except as provided in Intel's Terms and Conditions of

Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to

sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or

infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical, life

saving, or life sustaining applications.

Intel retains the right to make changes to specifications and product descriptions at any time, without notice.

The AP440FX motherboard may contain design defects or errors known as errata which may cause the product to deviate from

published specifications. Current characterized errata are available on request.

Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.

Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be

obtained from:

Intel Corporation

P.O. Box 7641

Mt. Prospect IL 60056-764

or call 1-800-879-4683

or call in North America 1-800-879-4683, Europe 44-0-1793-431-155, France 44-0-1793-421-777,

Germany 44-0-1793-421-333, other Countries 708-296-9333.

† Third-party brands and names are the property of their respective owners.

Copyright  Intel Corporation, 1996-1997.

iii

Table of Contents

1 Motherboard Description

1.1 Overview......................................................................................................................7

1.2 Motherboard Manufacturing Options ...........................................................................9

1.3 Form Factor.................................................................................................................9

1.4 I/O Shield...................................................................................................................10

1.5 Microprocessor ..........................................................................................................11

1.5.1 Microprocessor Upgrade .............................................................................11

1.5.2 Microprocessor Heatsink and Clips .............................................................11

1.6 Main System Memory................................................................................................12

1.6.1 DRAM..........................................................................................................12

1.6.2 Parity and ECC DRAM ................................................................................12

1.7 Chipset ......................................................................................................................12

1.7.1 82441FX PCI Bridge and Memory Controller (PMC)...................................12

1.7.2 82442FX Data Bus Accelerator (DBX) ........................................................13

1.7.3 82371SB PCI/ISA IDE Xccelerator (PIIX3)..................................................13

1.7.4 IDE Support.................................................................................................14

1.7.5 Secure Flash Support..................................................................................14

1.7.6 USB Support ...............................................................................................14

1.8 PC87307 Super I/O Controller...................................................................................15

1.8.1 Floppy Controller.........................................................................................15

1.8.2 Keyboard and Mouse Interface...................................................................15

1.8.3 Real-Time Clock, CMOS RAM and Battery .................................................16

1.8.4 Infrared Support ..........................................................................................16

1.8.5 Parallel Port.................................................................................................16

1.9 Graphics Subsystem..................................................................................................16

1.9.1 S3 ViRGE Graphics Subsystem..................................................................17

1.9.2 S3 ViRGE/DX Graphics Subsystem............................................................18

1.9.3 LBP VESA Feature Connector....................................................................18

1.9.4 Graphics Drivers and Utilities ......................................................................18

1.10 Audio Subsystem.......................................................................................................19

1.11 Management Extension Hardware.............................................................................19

1.12 Motherboard Connectors...........................................................................................20

1.12.1 Front Panel Connectors...............................................................................22

1.12.2 Memory/Expansion Connectors...................................................................25

1.12.3 VESA Feature Connector............................................................................27

1.12.4 Serial Header ..............................................................................................27

1.12.5 Audio Connectors........................................................................................28

1.12.6 Power Supply Connectors...........................................................................29

1.12.7 Floppy/IDE Connectors ...............................................................................30

1.12.8 Back Panel Connectors...............................................................................32

1.13 Jumper Settings.........................................................................................................35

1.13.1 Microprocessor Configuration (J4L2)...........................................................36

1.13.2 Motherboard Configuration (J4L2, J1J1).....................................................36

1.14 Reliability ...................................................................................................................37

AP440FX Motherboard Technical Product Specification

iv

1.15 Environmental............................................................................................................38

1.16 Power Consumption ..................................................................................................38

1.16.1 Power Supply Considerations .....................................................................39

1.17 Regulatory Compliance..............................................................................................39

1.17.1 Safety..........................................................................................................39

1.17.2 EMI..............................................................................................................40

1.17.3 Product Certification Markings.....................................................................40

2 Motherboard Resources

2.1 Memory Map..............................................................................................................41

2.2 I/O Map......................................................................................................................42

2.3 Soft-Off Control..........................................................................................................43

2.4 PCI Configuration Space Map ...................................................................................43

2.5 DMA Channels...........................................................................................................43

2.6 Interrupts ...................................................................................................................44

3 Motherboard BIOS and Setup Utility

3.1 Introduction................................................................................................................45

3.2 BIOS Flash Memory Organization .............................................................................45

3.3 BIOS Upgrades..........................................................................................................45

3.4 PCI IDE Support........................................................................................................46

3.5 PCI Auto-Configuration..............................................................................................46

3.6 ISA Plug and Play......................................................................................................47

3.7 Desktop Management Interface (DMI).......................................................................47

3.8 Advanced Power Management (APM).......................................................................48

3.9 Advanced Power Control (APC) ................................................................................48

3.10 Language Support.....................................................................................................49

3.11 Boot Options..............................................................................................................49

3.12 Flash LOGO Area......................................................................................................49

3.13 Setup Enable Jumper................................................................................................49

3.14 Overview of the Setup Menu Screens .......................................................................49

3.14.1 Main BIOS Setup Screen ............................................................................50

3.14.2 Floppy Options Subscreen..........................................................................51

3.14.3 IDE Device Configuration Subscreen..........................................................52

3.14.4 Boot Options Subscreen .............................................................................54

3.14.5 Advanced Screen........................................................................................56

3.14.6 Event Logging Configuration.......................................................................57

3.14.7 Peripheral Configuration Subscreen............................................................57

3.14.8 Advanced Chipset Configuration Subscreen...............................................61

3.14.9 Power Management Configuration Subscreen............................................63

3.14.10 Plug and Play Configuration Subscreen......................................................64

3.14.11 Event Logging Configuration.......................................................................66

3.14.12 Security Screen...........................................................................................68

3.14.13 Security Screen Options..............................................................................68

3.14.14 Exit Screen..................................................................................................69

Contents

v

4 Error Messages and Beep Codes

4.1 BIOS Beep Codes .....................................................................................................71

4.2 PCI Configuration Error Messages ............................................................................71

4.3 BIOS Error Messages................................................................................................73

4.4 ISA NMI Messages....................................................................................................74

Figures

1. Motherboard Features.................................................................................................8

2. Motherboard Dimensions.............................................................................................9

3. Back Panel I/O Shield Dimensions............................................................................10

4. Motherboard Connector Locations.............................................................................21

5. Front Panel I/O Connectors.......................................................................................22

6. Fan Connector Usage................................................................................................24

7. I/O Connections.........................................................................................................32

8. Jumper Locations ......................................................................................................35

Tables

1. Key to Motherboard Features......................................................................................8

2. S3 ViRGE Supported Resolutions.............................................................................17

3. S3 ViRGE/DX Supported Resolutions.......................................................................18

4. Front Panel I/O Connector (J2A1) .............................................................................22

5. Keylock Connector (J3A1).........................................................................................24

6. Auxiliary Fan Connector (J4A1).................................................................................24

7. PCI/ISA Riser Connector (J6J2) ................................................................................25

8. LBP VESA Feature Connector (J1K1).......................................................................27

9. Serial Port (COM2H, J3N1) Pinout ............................................................................27

10. CD-ROM Connector (J9N1).......................................................................................28

11. Wavetable Upgrade Connector (J9L1) ......................................................................28

12. Telephony Connector (J9K1).....................................................................................28

13. Primary Power Supply Connector (J9H1) ..................................................................29

14. External 3.3 V Power Supply Connector (J9J1)........................................................29

15. Soft-Off Power Supply Connector (J9F1)...................................................................30

16. Floppy Drive Connector (J8L1)..................................................................................30

17. IDE Connectors (J8H1, J9H2) ...................................................................................31

18. VGA Video Connector (J1N1)....................................................................................32

19. Serial Port Connector Pinout .....................................................................................33

20. USB Connector Pinout...............................................................................................33

21. PS/2 Keyboard/Mouse Connector Pinout..................................................................33

22. Parallel Port Connector Pinout...................................................................................34

23. Microprocessor/System Speed Settings....................................................................36

24. Configuration Jumper Settings...................................................................................37

25. Motherboard Environmental Specifications................................................................38

26. Power Usage.............................................................................................................38

27. DC Voltage ................................................................................................................39

28. Memory Map..............................................................................................................41

29. I/O Map......................................................................................................................42

30. PCI Configuration Space Map ...................................................................................43

31. DMA Channels...........................................................................................................43

AP440FX Motherboard Technical Product Specification

vi

32. Interrupts ...................................................................................................................44

33. Flash Memory Organization.......................................................................................45

34. Recommendations for Configuring an ATAPI Device ................................................46

35. Overview of the Setup Menu Screens .......................................................................50

36. Serial Port Configuration Options ..............................................................................58

37. Parallel Port Configuration Options............................................................................59

38. ECP - Compatible Configuration Options...................................................................60

39. Event Log Subscreens...............................................................................................67

40. Administrative and User Password Functions............................................................68

41. BIOS Beep Codes .....................................................................................................71

42. PCI Configuration Error Messages ............................................................................71

43. Chained PCI Error Messages....................................................................................72

44. BIOS Error Messages................................................................................................73

45. ISA NMI Messages....................................................................................................74

7

1 Motherboard Description

1.1 Overview

The AP440FX motherboard is a 64-bit, high-performance, mixed-voltage, energy-conscious,

highly integrated platform. The AP440FX motherboard supports the following set of features:

• Uses a 9-inch by 13-inch LPX form factor.

• Uses a type 8 Zero Insertion Force (ZIF) socket to house the standard processor, and provides

an upgrade path to future OverDrive

®

processors.

• Accepts Pentium

®

Pro

processors with core clock frequencies of 150 MHz, 166 MHz,

180 MHz, and 200 MHz.

• Supports up to 128 MB of DRAM using four standard 72-pin, tin-lead SIMM

†

sockets. The

modules can use Fast Page Mode (FPM) or Extended Data Out (EDO) memory. Non-parity

(32-bit) and parity (36-bit) memory SIMMs are supported. With parity SIMMs, the board can

be configured to support Error Checking and Correcting (ECC) memory operation.

• Uses Intel's 82440FX chipset. The Intel 82371SB PCI/ISA IDE Xccelerator (PIIX3) provides

an integrated Bus Mastering IDE controller with two high performance IDE interfaces for up to

four devices (such as hard drives or CD-ROM).

• Uses a flash BIOS with the following features:

− Uses both hardware and software Secure Flash features to protect flash contents from

corruption.

− Uses a BIOS that complies with the Desktop Management Interface (DMI-compliant).

• Uses the National Semiconductor Super I/O controller (the PC87307 or the pin-compatible

PC87308 device) to integrate the following standard PC I/O functions:

 floppy interface, two FIFO serial ports and one EPP/ECP capable parallel port

 real-time clock

 keyboard controller

 support for an IrDA

†

and Consumer Infrared interface at both slow and medium speeds

• Integrates a Crystal audio codec (CS4236) on the motherboard to provide 16-bit stereo, Sound

Blaster

†

Pro compatible audio. Provides an onboard telephony (modem) connector to support

the latest telephony applications.

• Integrates an S3

†

ViRGE/DX

†

graphics controller onboard to support SVGA graphics at

resolutions up to 1600x1200. An enhanced LBP VESA

†

feature connector supports external

multimedia capabilities.

• A hardware monitoring ASIC provides the following monitoring functions:

 Integrated temperature sensor

 Fan speed monitoring

 Power supply voltage monitoring

 Storage of power-on self test (POST) results and error codes

• PCI and ISA expansion slots are supported by a connector on the motherboard designed to

accept a riser card. An onboard jumper supports riser cards with either two or three PCI slots.

AP440FX Motherboard Technical Product Specification

8

OM06178

L

O

Q

R

P

AA

S

J

K

Z Y X W

T

U

V

M

N

AB

G

DE H

I

F

C

FF

HH

JJ

GG

CC

BB

DD

II

EE

KK

LL

MM

Figure 1. Motherboard Features

Table 1. Key to Motherboard Features

Key Description Key Description Key Description

A VGA

†

connector B Serial port connector C Side-by-side USB connectors

D PS/2

†

mouse connector E PS/2 keyboard connector F Parallel port connector

G I/O Controller (U7M1) H Microphone input jack I Audio output jack

J Crystal audio controller (U9M1) K CD-ROM header (4x1, J9N1) L Wavetable header (2x4, J9L1)

M Floppy connector (J8L1) N Telephony (modem) header (2x2,

J9K1)

O Standard 3.3V power connector (J9J1)

P Main power connector (J9H1) Q IDE connectors (J8H1, J9H2) R Soft Off header (3x1, J9F1)

S Hardware monitor ASIC (U9C1) T Flash BIOS (E28F002, U8C1) U Real-time clock battery (BT9B1)

V Onboard speaker (L9A1) W 3.5 V processor jumper (J8A2) X SIMM sockets (J6J1, J7J1, J7J2, J7J3)

Y Intel SB82371SB (PIIX3, U6E1) Z Auxiliary fan header (1x3, J4A1) AA Keylock header (3x1, J3A1)

BB Front panel connector (J2A1) CC Processor socket (U3C1) DD Intel SB82441FX (PMC, U4F1)

EE Intel SB82442FX (DBX, U2F1) FF ISA/PCI riser socket (J6J2) GG Consumer/Fast IR header (5x2, J4L1)

HH PCI slot Jumper block (2x3, J1J1) II LPB VESA header (J1K1) JJ S3 ViRGE/DX video controller (U2K1)

KK 2 MB of Video DRAM LL Configuration jumper block (J4L2) MM COM2H header (5x2, J3N1)

Motherboard Description

9

1.2 Motherboard Manufacturing Options

Contact your local Intel Field Sales Office for options and ordering information.

1.3 Form Factor

The motherboard is designed to fit into a standard LPX form factor chassis. Figure 2 illustrates the

mechanical form factor for the AP440FX. The AP440FX LPX form factor adheres to the standard

LPX guidelines with outer dimensions of 9 inches x 13 inches.

OM06179

5.50

10.98

8.45

12.63

0.150

8.65

0.35

3.55

0.00

7.15

0.00

0.37

7.10

Figure 2. Motherboard Dimensions

AP440FX Motherboard Technical Product Specification

10

1.4 I/O Shield

The back panel I/O shield for the AP440FX motherboard must meet specific dimensional and

material requirements. Computers based on the AP440FX motherboard need the back panel I/O

shield in order to pass certification testing. Figure 3 shows the critical dimensions for the I/O

shield and indicates the position of each cutout.

0.682

0.525

0.9000.235

0.118

2.534

3.945

4.645

6.904

8.193

9.000

0.021

0.080

0.079

0.027

0.075

Right-end View

OM06183A

5.302

5.963

Figure 3. Back Panel I/O Shield Dimensions

Motherboard Description

11

1.5 Microprocessor

The AP440FX motherboard operates with 2.1 V to 3.5 V Pentium Pro processors. An onboard

voltage regulator circuit provides the required voltages from the 5 V and 3.3 V taps off the power

supply. The onboard voltage regulator makes use of the VID capabilities to automatically adjust

its voltage output to match that of the installed processor. Pentium Pro processors running at 150,

166, 180, and 200 MHz are supported.

The Pentium Pro processor integrates the second level cache and cache controller that were

previously implemented on the motherboard. The internal, non-blocking L2 cache on the 150, 180

and 200 MHz processors is 256 KB, while second versions of the 166 and 200 MHz processors

integrate a 512 KB cache. The Pentium Pro processor has an advanced numeric coprocessor that

significantly increases the speed of floating point operations, while maintaining backward

compatibility with math coprocessors that comply with ANSI/IEEE standard 754-1985.

✏

NOTE

If you are installing a 3.5 V processor, a jumper must be installed on the jumper block located at

J8A2. See Section 1.13 for more information.

✏

NOTE

The 200 MHz Pentium Pro processor with 512 KB of cache memory is not supported on the

AP440FX motherboard.

1.5.1 Microprocessor Upgrade

Socket 8 is a 387-pin, modified staggered pin grid array (SPGA) zero insertion force (ZIF) socket,

along with a programmable voltage regulator for the microprocessor core. It provides users with a

performance upgrade path to OverDrive processors. The voltage regulator programming is

automatic and controlled by the VID pins of the processor.

1.5.2 Microprocessor Heatsink and Clips

An approved Pentium Pro processor heatsink is necessary for proper thermal dissipation in an LPX

compliant chassis. The processor/heatsink assembly must be securely fastened to the Socket 8 ZIF

socket by two clips. These clips fit over the heatsink assembly and attach to the outer wide tabs of

the Socket 8 assembly.

CAUTION

Do not use the older style of bail-wire clips for securing the heatsink assembly. These clips have

been found to damage the motherboard when installed or removed incorrectly.

AP440FX Motherboard Technical Product Specification

12

1.6 Main System Memory

The motherboard has four 72-pin tin-lead SIMM sockets that make it possible to install up to

128 MB of RAM. The sockets support 1M x 32 (4 MB) single-sided modules, 2M x 32 (8 MB),

4M x 32 (16 MB), and 8M x 32 (32 MB) single- or double-sided modules. Minimum memory size

is 8 MB and maximum memory size, using four 8M x 32 SIMM modules, is 128 MB. Memory

timing requires 60 ns fast page devices or, for optimum performance, 60 ns EDO DRAM. Both

parity and non-parity memory modules are supported. With parity SIMMs, the board can be

configured to support ECC operation.

The four sockets are arranged in two banks of two sockets each. The sockets are designated

Bank 0 and Bank 1. Each bank provides a 64/72-bit wide data path. Both SIMMs in a bank must

be of the same memory size and type, although the types and sizes of memory may differ between

banks. Bank 0 only, Bank 1 only, or both of the banks may be populated. There are no jumper

settings required for the memory size or type, which is automatically detected by the BIOS. Use

only tin lead SIMMs when adding DRAM.

1.6.1 DRAM

EDO (or Hyper Page) DRAM is designed to improve the DRAM read performance. EDO DRAM

holds the memory data valid until the next memory access cycle, unlike standard fast page mode

DRAM that tri-states the memory data when the precharge cycle occurs, prior to the next memory

access cycle.

1.6.2 Parity and ECC DRAM

Memory error checking and correction is supported by parity SIMMs. With parity SIMMs, the

board can be configured to support ECC memory operation. Parity SIMMs are automatically

detected, but the user must enter Setup to configure the SIMMs for either Parity or ECC operation.

Parity memory detects single bit errors. ECC memory detects double bit errors and corrects single

bit errors. Errors may be generated by a defective memory module, by different speeds of memory

modules, or by DMA or memory conflicts.

1.7 Chipset

The Intel 82440FX PCIset consists of the 82441FX PCI Bridge and Memory controller (PMC) and

the 82442FX Data Bus Accelerator (DBX). The Intel 82371SB PCI ISA/IDE Xccelerator (PIIX3)

bridge, provides the connection between the ISA and PCI buses.

1.7.1 82441FX PCI Bridge and Memory Controller (PMC)

The 82441FX comes in a 208 pin QFP package and provides the following features:

• Microprocessor interface control

 Pentium Pro processor host bus up to 66 MHz

 32-bit addressing

Motherboard Description

13

• Integrated DRAM controller

 64/72-bit Non-Interleaved path to memory w/ ECC support

 Support for EDO and Fast Page DRAM

 8 MB to 256 MB main memory

• Fully synchronous PCI bus interface

 PCI Rev. 2.1 - 5 V interface compliant

 25/30/33 MHz

 PCI to DRAM > 100 MBps

• Data Buffering

 Host-to-DRAM and PCI-to-DRAM write data buffering

 Write combining support for host-to-PCI burst writes

1.7.2 82442FX Data Bus Accelerator (DBX)

The DBX connects to the 64 bit Pentium Pro processor data bus, the 64/72 bit memory data bus

and the 16 bit PMC private data bus. The DBX works in parallel with the PMC to provide a high

performance memory subsystem for Pentium Pro processor based computers. The DBX comes in

a 208 pin PQF package.

1.7.3 82371SB PCI/ISA IDE Xccelerator (PIIX3)

The 82371SB provides the interface between the PCI and ISA buses and integrates a dual channel

fast IDE interface capable of supporting up to four devices. The 82371SB integrates four 8-bit and

three 16-bit DMA channels, three 8-bit timer/counters, two eight-channel interrupt controllers,

PCI-to-AT

†

interrupt mapping circuitry, NMI logic, ISA refresh address generation, and PCI/ISA

bus arbitration circuitry together into the same device. The PIIX3 comes in a 208-pin QFP

package and provides the following features:

• Interface between the PCI bus and ISA bus

• Universal Serial Bus (USB)

 Host/Hub Controller

 Support for 2 USB ports

• Integrated fast IDE interface

 Support for up to 4 devices with separate Master/Slave mode support

 PIO Mode 4 transfers up to 16 MB/sec

 Integrated 8 x 32-bit buffer for Bus Master IDE PCI burst transfers

• Enhanced DMA controller with Fast Type-F DMA

• Counters/Timers

• Power Management

 Programmable system management interrupt (SMI)

AP440FX Motherboard Technical Product Specification

14

1.7.4 IDE Support

The motherboard provides two independent high performance bus-mastering PCI IDE interfaces

capable of supporting PIO Mode 3 and Mode 4 devices. The BIOS supports Logical Block

Addressing (LBA) and Extended Cylinder Sector Head (ECHS) translation modes as well as ATAPI

(e.g., CD-ROM) devices on both IDE interfaces. Detection of IDE device transfer rate and

translation mode capability is automatically determined by the BIOS.

Normally, programmed I/O operations require a substantial amount of microprocessor bandwidth.

In true multi-tasking operating systems like Windows

†

95, the microprocessor bandwidth freed up

by using PCI bus mastering IDE can be used to complete other tasks while disk transfers are

occurring. When used in conjunction with the appropriate driver for the Windows 95 environment,

the IDE interface can operate as a PCI bus master capable of supporting PIO Mode 4 devices with

transfer rates of up to 16 MB/sec.

Detailed information on the PCIset is available in the Intel 82440FX PCISet data sheet.

1.7.5 Secure Flash Support

The AP440FX motherboard uses both onboard hardware and BIOS code support to protect the

onboard flash memory device from accidentally or intentionally being corrupted. A general

purpose I/O (GPIO) port of the I/O controller is used to control the write enable line of the flash

device. By putting the microprocessor in System Management Mode (SMM) whenever the flash

write is enabled, the BIOS can ensure that the SMM code is not corrupted and that flash can only

be written from within SMM.

1.7.6 USB Support

The AP440FX motherboard has two USB ports. This permits connection of two USB peripheral

devices directly to the computer without an external hub. If more devices are required, an external

hub can be connected to either of the built-in ports. The motherboard completely supports the

standard universal host controller interface (UHCI) and takes advantage of the standard software

drivers written to be compatible with UHCI. Features of the USB include:

• Self-identifying peripherals

• Automatic mapping of function to driver and configuration

• Support for isochronous and asynchronous transfer types over the same set of wires

• Support for up to 127 physical devices

• Guaranteed bandwidth and low latencies appropriate for telephony, audio, and other

applications

• Error handling and fault recovery mechanisms built into protocol

• Low cost cables and connectors

Motherboard Description

15

1.8 PC87307 Super I/O Controller

Control for the integrated serial ports, parallel port, floppy drive, real-time clock, and keyboard

controller is incorporated into a single component, the National Semiconductor PC87307. The

PC87307 is a fully Plug and Play compatible device which provides:

• Two NS16C550-compatible UARTs with send/receive 16 byte FIFO

 Support for an IrDA and Consumer IR compliant Infrared interface

• Multi-mode bi-directional parallel port

 Standard mode; IBM

†

and Centronics

†

compatible

 Enhanced Parallel Port (EPP) with BIOS/Driver support

 High Speed mode; Extended Capabilities Port (ECP) compatible

• Industry standard floppy controller with 16 byte data FIFO (2.88 MB floppy support)

• Integrated Real Time Clock with Century calendar functionality

• Integrated 8042 compatible keyboard controller

The PC87307 is normally configured automatically by the BIOS, but configuration of these

interfaces also is possible using the CMOS Setup utility that can be invoked during boot. The

serial ports can be enabled as COM1, COM2, COM2 as IrDA, or disabled. The parallel port can

be configured as compatible, bi-directional, EPP/ECP, or disabled. The floppy interface can be

configured for 360 KB or 1.2 MB 5¼" media or for 720 KB, 1.2 MB, 1.44 MB, or 2.88 MB

3½" media.

1.8.1 Floppy Controller

The PC87307 is software compatible with the DP8473 and 82077 floppy disk controllers. The

floppy interface can be configured for 360 KB or 1.2 MB 5¼" media or for 720 KB, 1.2 MB,

1.44 MB, or 2.88 MB 3½" media in the BIOS setup. By default, the Floppy A interface is

configured for 1.44 MB and Floppy B is disabled. Configuring the floppy interface for 1.2 MB

3½" (3-mode floppy) requires the use of a driver to operate correctly.

1.8.2 Keyboard and Mouse Interface

PS/2 keyboard/mouse connectors are located on the back panel side of the motherboard. The 5V

lines to these connectors are protected with a PolySwitch

†

circuit which acts much like a self-

healing fuse, re-establishing the connection after an over-current condition is removed. While this

device eliminates the possibility of having to replace a fuse, care should be taken to turn off the

power before installing or removing a keyboard or mouse.

The integrated 8042 microcontroller contains the AMI Megakey keyboard/mouse controller code

which, besides providing traditional keyboard and mouse control functions, supports Power-

On/Reset (POR) password protection. The POR password can be defined by the user in the Setup

program. The keyboard controller also provides for the following “hot-key” sequences:

• <CTRL> <ALT> <DEL>: System software reset. This sequence performs a software reset of

the computer by jumping to the beginning of the BIOS code and running the POST operation.

AP440FX Motherboard Technical Product Specification

16

• <CTRL> <ALT> <defined in Setup>: Power down and coffee-break key sequences take

advantage of the SMM features of the Pentium Pro processor to greatly reduce the computer’s

power consumption while maintaining the responsiveness necessary to service external

interrupts.

• <CTRL> <ALT> <defined in Setup>: Keyboard secure hot keys lock the keyboard until user

specified password is given.

1.8.3 Real-Time Clock, CMOS RAM and Battery

The integrated real-time clock is compatible with DS1287 and MC146818 components. It

provides a time of day clock, a 100-year calendar with alarm features, and a century register. The

real-time clock can be set in the Setup program. The real-time clock also supports 242-byte

battery-backed CMOS RAM in two banks which is reserved for BIOS use. The CMOS RAM can

be set to specific values or cleared to the default values using the Setup program. Also, the CMOS

RAM values can be cleared to the defaults by using a configuration jumper on the motherboard.

An external coin-cell style battery provides power to the real-time clock and CMOS memory. The

battery used is a long-life version that is socketed for easy replacement. When the computer is on,

the life of the battery is extended by a trickle current from the power supply.

1.8.4 Infrared Support

A 5-pin interface on the front panel I/O connector allows connection to a Hewlett Packard

†

HSDL-

1000 compatible infrared (IrDA) transmitter/receiver. Once the module is connected to the front

panel I/O header, Serial port 2 can be redirected to the IrDA module. When configured for IrDA,

the user can transfer files to or from portable devices such as laptops, PDAs and printers using

application software such as LapLink

†

. The IrDA specification provides for data transfers at

115kbps from a distance of 1 meter. Support for Consumer Infrared (ASK-IR and DASK-IR

options for SHARP-IR) is also included. Consumer infrared is supported at both slow and medium

speeds.

1.8.5 Parallel Port

A 25-pin D-Sub header is provided on the back panel for a multi-mode bi-directional parallel port.

The parallel port operates in standard mode, Enhanced Parallel Port (EPP) version 1.7 mode, with

BIOS and Driver support, and a high speed Extended Capabilities Port (ECP) compatible mode.

EPP Mode requires a driver provided by the peripheral manufacturer to operate correctly.

1.9 Graphics Subsystem

The AP440FX motherboard is available with a factory option of an S3 ViRGE

†

or ViRGE/DX

SVGA graphics controller. Both options are supported by 2 MB of 50 ns EDO SOJ DRAM

soldered to the motherboard. The AP440FX motherboard also supports the S3 media channel, also

known as the Local Peripheral Bus (LBP) or Scenic Highway.

Motherboard Description

17

1.9.1 S3 ViRGE Graphics Subsystem

The AP440FX motherboard is available with a factory option of an S3 ViRGE SVGA graphics

controller with 2 MB of 50 ns EDO SOJ DRAM. The S3 ViRGE has a high performance 64-bit

2D/3D graphics engine and incorporates the S3 Streams Processor that enables the device to

convert YUV formatted video data to RGB and provides acceleration for scaling the video display

without compromising picture quality or frame rate. The on-chip RAMDAC/clock synthesizer is

capable of output pixel data rates of 135 MHz providing non-interlaced screen resolutions of up to

1280x1024x256 colors at 75 Hz. The 64-bit S3d Engine incorporates the key Windows and other

GUI accelerator functions of BitBLT, line draw and polygon fill. 3D features include flat shading,

Gouraud shading and texture mapping support. Advanced texture mapping features include

perspective correction, bi-linear and tri-linear filtering, MIP-mapping, and Z-buffering. These

features provide the most realistic user experience for interactive 3D applications. In addition, a

fast linear addressing scheme based upon DCI reduces software overhead by mapping the display

memory into the microprocessor’s upper memory address space and permitting direct

microprocessor access to the display memory.

Table 2. S3 ViRGE Supported Resolutions

Resolution Refresh rate (Hz)

640 x 480 x 16 colors 60

640 x 480 x 256 colors 60, 72, 75, 85

640 x 480 x 65,536 colors 60, 72, 75

640 x 480 x 16,777,216 colors (non-accelerated mode) 60, 72, 75

800 x 600 x 256 56, 60, 72, 75, 85

800 x 600 x 65,536 60, 72, 75

800 x 600 x 16,777,216 colors (non-accelerated mode) 60, 72, 75

1024 x 768 x 256 43(IL), 60, 70, 75, 85

1024 x 768 x 65,536 43(IL), 60, 70, 75

1280 x 1024 x 256 45(IL), 60, 72, 75

NOTE: IL = Interlaced

The S3 ViRGE graphics controller supports more modes than shown above. The graphics drivers provide options for

additional resolutions.

AP440FX Motherboard Technical Product Specification

18

1.9.2 S3 ViRGE/DX Graphics Subsystem

The optional onboard graphics subsystem uses the S3 ViRGE/DX graphics controller, with the

following features:

• 64-bit graphics engine with accelerator core

• 24-bit RAMDAC/clock synthesizer

• Dual programmable clock generators

• DCI-based linear addressing scheme

• S3 Streams Processor, which enables the conversion of video data from YUV format to RGB

format and accelerates display scaling while maintaining picture quality and frame rate

• 3-D graphics support including flat shading, Gouraud shading, and advanced texture mapping

• S3 Scenic Highway support for hardware MPEG

Table 3. S3 ViRGE/DX Supported Resolutions

Refresh Rate (Hz) At:

Resolution

4-bit Color

(16 Colors)

8-bit Color

(256 Colors)

15/16-bit Color

(32K/64K Colors)

24-bit Color

(16M Colors)

32-bit Color

(16M Colors)

640 x 480 60 60, 72, 75, 85 60, 72, 75 60, 72, 75 * 60, 72, 75

800 x 600 not supported 56, 60, 72, 75,

85

60, 72, 75 60, 72, 75 * 60, 72, 75

1024 x 768 not supported 43(IL), 60 ,70,

75, 85

43(IL), 60, 70, 75 not supported not supported

1280 x 1024 43(IL), 45(IL),

60, 72, 75 *

45(IL), 60, 72, 75 not supported not supported not supported

1600 x 1200 not supported 48.5(IL) not supported not supported not supported

* Non-accelerated mode only

IL = Interlaced

The S3 ViRGE/DX graphics controller supports more modes than shown above. The graphics drivers provide options for

additional resolutions.

1.9.3 LBP VESA Feature Connector

The AP440FX motherboard supports a 34-pin VESA feature connector (which also accepts a

26-pin peripheral plug) for synchronizing graphics output with an external NTSC or PAL signal

and a shared frame buffer interface to maximize multimedia performance, as well as the LPB or

Scenic Highway that provides a glueless bi-directional interface to a video companion device such

as an MPEG/live video decoder. The AP440FX also supports other VESA standards such as the

VESA DPMS protocol to put a DPMS compliant monitor into power saving modes and the VESA

Display Data Channel (DDC2B) that permits transfer of monitor identification and resolution

support data for ease of use.

1.9.4 Graphics Drivers and Utilities

Graphics drivers and utilities may be downloaded from the Intel Applications Support web site at

http://www-cs.intel.com/oem_developer/motherbd. Once the site is accessed, perform a keyword

search for the specific application and its driver. Drivers for SCO

†

UNIX

†

are available from SCO.

Motherboard Description

19

1.10 Audio Subsystem

The AP440FX motherboard features a 16-bit stereo audio subsystem as a factory installed option.

The audio subsystem is based on the Crystal CS4236 multimedia codec. The CS4236 provides all

the digital audio and analog mixing functions required for playing and recording of audio on

personal computers. These functions include:

• Stereo analog-to-digital and digital-to-analog converters

• Analog mixing

• Anti-aliasing and reconstruction filters

• Line and microphone level inputs

• Digital audio compression using selectable A-law / µlaw

• Full digital control of all mixer and volume control functions

The CS4236 also provides support for four major sound standards including AdLib

†

, Sound

Blaster Pro 2.0, Windows Sound System, and MPU-401. The CS4236 also supports full-duplex

operation which ensures support for applications such as video conferencing.

The CS4236 includes a Plug and Play compatible ISA interface and is comprised of seven logical

devices including:

• Synthesizer

• Game Port

• Sound Blaster

• Sound System

• MPU-401

• CD-ROM

• CS4236 device

Each logical device is configured into the host environment using the ISA Plug and Play

configuration methodologies. The audio subsystem requires up to two DMA channels and one

interrupt. The computer can be configured to use either DMA channels 0, 1, or 3. The interrupt

can be mapped to use interrupt 5, 7, 9, 11, 12, or 15.

1.11 Management Extension Hardware

The Management Extension hardware provides low-cost instrumentation capabilities designed to

reduce the total cost of PC ownership. The Management Extension hardware incorporates features

that support the requirements of the Desktop Management Interface (DMI) compliant areas of the

BIOS, as well as those of the LANDesk



Client Manager software. The hardware implementation

is a single-chip ASIC with the following features:

• An integrated temperature sensor plus support for an external temperature sensor

• Support for one fan speed sensor

• Power supply voltage monitoring to detect levels above or below acceptable values

• Registers for storing POST hardware test results and error codes

• Remote reset capabilities from a remote peer or server through LANDesk Client Manager,

Version 3.0 and service layers (when available)

• Hardware compatibility with Windows NT

†

.

AP440FX Motherboard Technical Product Specification

20

When an out-of-range condition (temperature, fan speed, or voltage) is reached, an interrupt is

activated. The Management Extension circuitry connects to the ISA bus as an 8-bit I/O mapped

device and uses the I/O addresses identified in the I/O map.

1.12 Motherboard Connectors

The AP440FX motherboard has onboard connectors supporting the following feature areas:

• Front panel features

• Memory (SIMM) and expansion (PCI/ISA riser) sockets

• Video features

• Serial header

• Audio features

• Power connectors

• Floppy and PCI IDE connectors

Figure 4 identifies the connectors on the AP440FX motherboard, and indicates the feature area

with which each connector is associated.

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Intel AP440FX User manual

Intel AP440FX User manual

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